<?php
/**
 * Created by PhpStorm.
 * User: Administrator
 * Date: 2018/12/19
 * Time: 21:40
 */

namespace app\index\controller;


use think\Db;

class Wxpay
{
    //小程序appid
    protected $appid;
    //小程序AppSecret
    protected $AppSecret;
    //商户号
    protected $mch_id;
    //商户支付秘钥
    protected $key;
    //小程序openid
    protected $openid;
    //订单号
    protected $out_trade_no;
    //支付商品名
    protected $body;
    //支付金额
    protected $total_fee;


    function __construct() {
         $arr = [
            ['APPID'=>'wxe8c78509bd01413f','AppSecret'=>'1c4df27d547b3928e5394fae825c3b6b'],
            ['APPID'=>'wx13841ad017b28f4c','AppSecret'=>'8f0add293cd932d3cbecb0c58666b393'],
        ];
        $type =input('type')?input('type'):0;

        $this->appid=$arr[$type]['APPID'];
        $this->AppSecret=$arr[$type]['AppSecret'];
        $this->mch_id='1516593971';
        $this->key='e10adc3949ba59abbe56e057f20f883e';
//        $this->out_trade_no = '1516593971'. time();
        $this->body = "家政服务";

    }
    /**
     * 获取用户信息openID
     */
    public function sendCode(){
        $couponid = input('couponid');
        $this->out_trade_no  = input('order_mun');
        if (isset($couponid) && $couponid >0){
            if (input('orderAmount') == 0){

                echo json_encode(['totalPrice'=>0]);
                die;
            }else{
                //更新订单状态和添加订单的优惠券
            }
        }
        $code = input("code", '', 'htmlspecialchars_decode');
        $url = 'https://api.weixin.qq.com/sns/jscode2session?appid='.$this->appid.'&secret='.$this->AppSecret.'&js_code='.$code.'&grant_type=authorization_code';
        $arr = $this -> vegt($url);
        $userinfo = json_decode($arr,true);
        $this->openid=$userinfo['openid'];


        $this->total_fee = floatval(input('orderAmount')*100);
        $data = $this->pay();
        echo json_encode($data);
    }
    public function notify()
    {
        // 获取微信回调的数据
        $notifiedData = file_get_contents('php://input');

        //XML格式转换
        $xmlObj = simplexml_load_string($notifiedData, 'SimpleXMLElement', LIBXML_NOCDATA);
        $xmlObj = json_decode(json_encode($xmlObj),true);

        // 当支付通知返回支付成功时
        if ($xmlObj['return_code'] == "SUCCESS" && $xmlObj['result_code'] == "SUCCESS") {

            //获取返回的所以参数
            //这里是要把微信返给我们的所有值，先删除sign的值，其他值 按ASCII从小到大排序，md5加密+‘key’；

            foreach( $xmlObj as $k=>$v) {
                if($k == 'sign') {
                    $xmlSign = $xmlObj[$k];
                    unset($xmlObj[$k]);
                };
            }

            $sign = http_build_query($xmlObj);
            //md5处理
            $sign = md5($sign.'&key='.$this->key);
            //转大写
            $sign = strtoupper($sign);

            //验签名。默认支持MD5
            //验证加密后的32位值和 微信返回的sign 是否一致！！！
            if ( $sign === $xmlSign) {
                // 总订单号
                $trade_no = $xmlObj['out_trade_no'];
                $order = Db::name('orders')->where('order_mun',$trade_no)->find();
                if (!empty($order)){
                    Db::name('orders')->where('order_mun',$trade_no)->update(['out_trade_no'=>$xmlObj['transaction_id']]);
                }
                return 'SUCCESS';
            }

        }
    }
    public function vegt($url)
    {
        $ch = curl_init();//初始化curl
        curl_setopt($ch, CURLOPT_TIMEOUT, 300);//设置超时
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER,FALSE);
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST,FALSE);
        curl_setopt($ch, CURLOPT_HEADER, FALSE);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
        $res = curl_exec($ch);//运行curl，结果以jason形式返回
//        $data = json_decode($res,true);
        curl_close($ch);

        return $res;
    }
    public function pay() {
        //统一下单接口
        $return = $this->weixinapp();
        return $return;
    }


    //统一下单接口
    private function unifiedorder() {
        $url = 'https://api.mch.weixin.qq.com/pay/unifiedorder';
        $parameters = array(
            'appid' => $this->appid, //小程序ID
            'mch_id' => $this->mch_id, //商户号
            'nonce_str' => $this->createNoncestr(), //随机字符串
//            'body' => 'test', //商品描述
            'body' => $this->body,
//            'out_trade_no' => '2015450806125348', //商户订单号
            'out_trade_no'=> $this->out_trade_no,
//            'total_fee' => floatval(0.01 * 100), //总金额 单位 分
            'total_fee' => $this->total_fee,
//            'spbill_create_ip' => $_SERVER['REMOTE_ADDR'], //终端IP
            'spbill_create_ip' => '47.107.144.132', //终端IP
            'notify_url' => 'https://wukongweixiu.cn/index.php/index/Wxpay/notify.html', //通知地址  确保外网能正常访问
            'openid' => $this->openid, //用户id
            'trade_type' => 'JSAPI'//交易类型
        );


        //统一下单签名
        $parameters['sign'] = $this->getSign($parameters);
        $xmlData = $this->arrayToXml($parameters);
        $return = $this->xmlToArray($this->postXmlCurl($xmlData, $url, 60));
        return $return;
    }


    private static function postXmlCurl($xml, $url, $second = 30)
    {
        $ch = curl_init();
        //设置超时
        curl_setopt($ch, CURLOPT_TIMEOUT, $second);
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE); //严格校验
        //设置header
        curl_setopt($ch, CURLOPT_HEADER, FALSE);
        //要求结果为字符串且输出到屏幕上
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
        //post提交方式
        curl_setopt($ch, CURLOPT_POST, TRUE);
        curl_setopt($ch, CURLOPT_POSTFIELDS, $xml);


        curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 20);
        curl_setopt($ch, CURLOPT_TIMEOUT, 40);
        set_time_limit(0);


        //运行curl
        $data = curl_exec($ch);      
        //返回结果
        if ($data) {
            curl_close($ch);
            return $data;
        } else {
            $error = curl_errno($ch);
            curl_close($ch);

            throw new WxPayException("curl出错，错误码:$error");
        }
    }



    //数组转换成xml
    private function arrayToXml($arr) {
        $xml = "<root>";
        foreach ($arr as $key => $val) {
            if (is_array($val)) {
                $xml .= "<" . $key . ">" . arrayToXml($val) . "</" . $key . ">";
            } else {
                $xml .= "<" . $key . ">" . $val . "</" . $key . ">";
            }
        }
        $xml .= "</root>";
        return $xml;
    }


    //xml转换成数组
    private function xmlToArray($xml) {
        //禁止引用外部xml实体
        libxml_disable_entity_loader(true);
        $xmlstring = simplexml_load_string($xml, 'SimpleXMLElement', LIBXML_NOCDATA);
        $val = json_decode(json_encode($xmlstring), true);
        return $val;
    }


    //微信小程序接口
    private function weixinapp() {
        //统一下单接口
        $unifiedorder = $this->unifiedorder();
//        print_r($unifiedorder);
        $parameters = array(
            'appId' => $this->appid, //小程序ID
            'timeStamp' => '' . time() . '', //时间戳
            'nonceStr' => $this->createNoncestr(), //随机串
            'package' => 'prepay_id=' . $unifiedorder['prepay_id'], //数据包
            'signType' => 'MD5'//签名方式
        );
        //签名
        $parameters['paySign'] = $this->getSign($parameters);
        return $parameters;
    }


    //作用：产生随机字符串，不长于32位
    private function createNoncestr($length = 32) {
        $chars = "abcdefghijklmnopqrstuvwxyz0123456789";
        $str = "";
        for ($i = 0; $i < $length; $i++) {
            $str .= substr($chars, mt_rand(0, strlen($chars) - 1), 1);
        }
        return $str;
    }


    //作用：生成签名
    private function getSign($Obj) {
        foreach ($Obj as $k => $v) {
            $Parameters[$k] = $v;
        }
        //签名步骤一：按字典序排序参数
        ksort($Parameters);
        $String = $this->formatBizQueryParaMap($Parameters, false);
        //签名步骤二：在string后加入KEY
        $String = $String . "&key=" . $this->key;
        //签名步骤三：MD5加密
        $String = md5($String);
        //签名步骤四：所有字符转为大写
        $result_ = strtoupper($String);
        return $result_;
    }


    ///作用：格式化参数，签名过程需要使用
    private function formatBizQueryParaMap($paraMap, $urlencode) {
        $buff = "";
        ksort($paraMap);
        foreach ($paraMap as $k => $v) {
            if ($urlencode) {
                $v = urlencode($v);
            }
            $buff .= $k . "=" . $v . "&";
        }
        $reqPar;
        if (strlen($buff) > 0) {
            $reqPar = substr($buff, 0, strlen($buff) - 1);
        }
        return $reqPar;
    }

}